Air-compressor.



No. 852,541. PATENTED MAY '7, 1907. R. A. & L. B. GOUSANS.

AIR COMPRESSOR.

APPLIOATION FILED NOV. 30. 1903.

2 SHEETS-SHEET 1.

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WW g PATENTED MAY '7, 1907.

R. A. & L. B. GOUSANS.

AIR COMPRESSOR.

APPLICATION FILED NOV. so. 1903.

2 SHEETS-3313B! 2.

UNITED s'ragas PATENT OFFICE.

REGINALD ARTHUR COUSANS AND LOUIS BERTRAM COUSANS, OF LINCOLN,

' ENGLAND;

AIR-COMPRESSOR.

Specification of Letters Patent.

Patented May 7, 1907- Application filed November 30, 1903. Serial No. 183,305.

To all whom it may concern.-

Be it known that we, REGINALD ARTHUR COUSANS and LoUIs BERTRAM OoUsANs, subjects of the King of Great Britain and he land, both residing in Lincoln, England, have invented certain new and useful Improvements inand Relating to Air-Com ressors for BlowingDrgans, of which the f0 owing is a specification.

- This invention relates to air com ressors for blowing organs and has for its o ject to provide means whereby a series of air compressors of the compound centrifugal fan type may be employed for this urpose with efiiciency, and whereby the en thrusts peculiar to single inlet centrifugal fans will be eliminated or counteracted, means being also provided for allowing of separate air reser; voirs in an organ being supplied with air simultaneously at the different pressures required for. each reservoir.

According to this invention where a number of single inlet fans are mounted u on the same spindle w.e arrange that the in st of a certain number of such fans shall be on the opposite side to those of the remainder, or we provide in the casings suitable air assages or trunks which will convey the airiihlivered at a certain pressure from one fan to the oppositely disposed inlet of the adjacent or other fan or fans, the air when compressed to a higher pressure due to the efforts of the said fans bein delivered to the oppositely disposed inlets of another or other for the purpose of being raised to the final pressure required. It will be seen that these air passages or trunks may be tapped and connected separately to the separate and distinct air reservoirs of an or an for the ur ose of withdrawing and uti izing air at t e 'fi'erent pressures corresponding to each such assage in such reservoirs simultaneously. he

end thrust due to single inlet fans will be entirely eliminated where an equal number of fans are em loyed, and where an odd number are emp oyed there Will only remain the end thrust of one fan which will be so small as to be usually neglected.

Further the invention also provides, in combination with the above construction, means for insuring the working of the fans without noise and with a steadier inflow of air, this being accomplished by roviding the mlet or a number of inlets to t e first fan of the series with automatically lifting valves the function of which is not to act as nonreturn valves when the fans are at. rest, but to damp or deaden the noise of the inflowing tion of the fans when they are working but not sucking in air (the outlet valve, leading to the organ reservoir, being closed). It is at this time that the organ is not being layed and it is most essential that the lower should be silent.

We have illustrated in the accompanying drawings a construction and arrangement of compound fan made in accordance with this invention.

Figure 1 shows two fans mounted and driven by one spindle, the view being a lon gitudinal section. Fig. 2 is a perspective view of Fig. l showingthe passages for air trunks arranged at the side. Fig. 3 is a similar view to Fig. 1 showing four fans. Fig. 4 is a perspective view of the fan shown in Fig. 3, and means for simultaneously distributing air at different pressures to four distinct organ reservoirs.

Referring to Figs. 1 and 2, a is the driven shaft or spindle upon which are mounted two on the left hand side through an inlet chamber b to which the air hasaccess through a flap valve 0 adapted to be opened by the suction of the fan. These valves may be conveniently mounted upon hinge pins 0 and need not be air tight, as they are not destined to prevent back flow of air. While the organ is laying "air is being sucked through the mile and the valve is held-open by the current of air. As soon as the organ ceases playing it is important to suppress the sound caused by the rotating of the fans and the disturbance of the air Within the casing. As the fans are not sucking air at this time the valve automatically closes, cutting off the noise which would otherwise be considerable. A number of these inlets may be arranged in the base of the inlet chamber. The fan f delivers air through tition 0 (said 0 enings leading theair arallel to the axis) into a chamber (1 from iivhich the air compressed say to two inches pressure is delivered by passages or air trunks e e to a chamber 9 on the opposite side of fan f so that the air from the chamber 9 is air and prevent the noise caused by the rotafans f f; the fan f draws air from an inlet 1) openings it through the periphery of a par- I drawn in or delivered to the fan f by any opening it .disposed oppositely to the open ing b of the fan f, the fan f delivers all to the chamber 7' compressed to a further stage, say 4 inches, the discharge from fan f being passed into the chamber 7' through the apertures 'n' in a partition similar to that described in reference to the first fan. These apertures draw off the air in the same directionas the shaft and at different points around the fan, thus distributing the flow; over a larger area, and eflectively minimizing any tendency to produce noise in working,

further these openings having a similar effect in minimizing any violent flow of air in the intermediate chamber.

' Fig. .3 illustrates a modified construction showing a spindle carrying four fans, the arrangement of chambers and air trunks, partitions and passages is very similar to that shown in Fig. 1, but modified to suit the use of four fans, for instance the air delivered from the fan f will be conducted by apassage 7c in a trunk e tothe opposite inlet of the fan f and the air from the chamber -Z into which fan f 4 delivers will be conveyed. by a trunk is to the inlet of fan f 5 disposed on the same side or in the same direction as that of fan f 3, and the air delivered from fan 5 will be delivered by an air trunk it to an 0 (l 'vered from the said fan f at the final pressure into a chamber m.

By this arrangement the use of anumber of single inlet fans on the same spindle is ren dered possible for the purposes of the invention as the end thrusts o the various fans will be counterbalanced or eliminated, while the final delivery of .air'will be at apressure equal to the efforts of the several fans combmed. As shown in Fig. 4, the air trunks reservoirs g, g and q". The air .may be .ositely disposed inlet of the fan f and purposes,.the airat ein'g led to the sepadrawn from several reservoirs as needed by pipes Q Q Q and Q leading to different parts of the organ;

The most important function of this improvement is inthe maintaining of a quantity of air at the desired high pressure with a minimum of noise. Quiet running is facili tatedby the arrangement of the fans in the center of the space-within their several chambers, and ease of running isalso determined by the fact that theydo not make contact either at their ed es or their sides with the casing. 'Each an is preferably formed with a rear disk plate 7" anda front annular plate 8 the cut out central ortion of which forms the inlet opening, t e blades being held between the two lates in. any usual or suitable manner. Ill l therefore that substantially the entire'chamber of each fan is filled with compressed air and the pressure of the air at the rear side of the disk 1' is such as to causea considerable axial thrust in the direction from this rear plate toward the inlet. This thrustoccurs tosu-ch an. extent as to seriously interfere with the regular .and' uiet runnin of the complressor unless it e counter alanced in w oleor in considerable part by-the arrangement described. Each of the fans performs substantially an equal share of the work of raising the pressure, and therefore the axial thrust of each is substantially the same. The dividing of the compression into these successive stages therefore assists in the reduction ofthe axial thrust even where there is an odd number of fans.

What we claim as our invention and desire to secure by Letters Patent is An organ blower in luding in combination a casing, a fan within said casmg, and a silencing valve .mounted'at the inlet to the casing and adapted to prevent the escape of the noise made by the movement of the fan and the air within the casing when the fan is rotating without substantial suction through the inlet. 1

In witness whereof, we have hereunto signed our names in the presence of two subscribing witnesses. v 44 REGINA-Ll) ARTHUR COUSANS.

LOUIS BERTRAM COUSANS.

Witnesses: i

THos. H. 0001:, I

i ERNEST MORAN.

will be apparent 

